Efficient models for wind turbine extreme loads using inverse reliability

Probabilistic Analysis of List Data for the Estimation of Extreme Design Loads for Wind Turbine Components

Robust estimation of wind turbine design loads for service lifetimes of 30 to 50 years that are based on field measurements of a few days is a challenging problem. Estimating the long-term load distribution involves the integration of conditional distributions of extreme loads over the mean wind speed and turbulence intensity distributions. However, the accuracy of the statistical extrapolation...

Wind Simulation for Extreme and Fatigue Loads

Målinger af atmosfærisk turbulens afviger fra en Gaussisk proces, specielt hvad ang̊ar hastighedsændringer over sm̊a tidsskridt, hvor halerne p̊a sandsynlighedsfordelingen snarere er ekspotentielle end Gaussiske. Tælleprincipperne for ekstreme hændelser og eksistensen af kaskader af hændelser gennemg̊as. Empiriske ekstremstatistikker findes i overensstemmelse med Rices overskridelsesteori, n̊ar ford...

Damping Wind and Wave Loads on a Floating Wind Turbine

Offshore wind energy capitalizes on the higher and less turbulent wind speeds at sea. To enable deployment of wind turbines in deep-water locations, structures are being explored, where wind turbines are placed on a floating platform. This combined structure presents a new control problem, due to the partly unconstrained movement of the platform and ocean wave excitation. If this additional com...

The Performance of Wind Turbine Smart Rotor Control Approaches During Extreme Loads

Time-dependent Reliability Analysis for Turbine Blade in Extreme Wind Loading

In order to evaluate the reliability of turbine blades over a certain time period, a time-dependent reliability analysis model is developed in this paper for turbine blades in extreme wind loading. The extreme wind loading over a certain return period and the deterioration of the blade material are considered to investigate the time influence on the reliability of turbine blades. Only failure i...